广西优势海草卵叶喜盐草生长繁殖的季节变化及斑块中心-边缘效应

doi:10.11978/2025040

Abstract

Abstract:

Halophila ovalis is a dioecious seagrass species capable of both sexual reproduction and clonal propagation. This study investigated the seasonal growth and reproductive characteristics of H. ovalis population through quarterly monitoring in Zhulin, Guangxi, with particular focus on reproductive differences between female and male individuals at the center and edges of seagrass patches. Results showed that the density, coverage, and biomass of H. ovalis peaked in spring, reaching 47% (±9%), (2967.36 ± 661.96) ind·m^-2, and (37.68 ± 8.85) gDW·m^-2, respectively. Annual averages were 38% (±14%) for coverage, (1851.02 ± 1036.81) ind·m^-2 for shoot density, and (27.60 ± 13.97) gDW·m^-2 for biomass. Sexual reproduction occurred in spring, with distinct female and male flowers. Both seagrass density and biomass were significantly higher at patch centers than at edges - a pattern also mirrored in macrobenthic biomass. Male individuals exhibited significantly shorter internode lengths than females, though no significant differences were observed between center and edge positions within either sex. These findings provide fundamental insights into the reproductive ecology of H. ovalis, offering scientific support for the conservation and restoration of seagrass beds.

Key words: Halophila ovalis, seasonal variation, sexual reproduction, center-edge effect, Guangxi sea areas

CLC Number:

P734.43

ZHENG Zhenming, YU Shuo, HUANG Yuzhou, ZHU Fangchao, CHEN Xuyang, XIONG Zhixiang, LIU Peipei. Seasonal variations in growth and reproduction of Halophila ovalis, a dominant seagrass in Guangxi, and their center-edge effects within patches[J].Journal of Tropical Oceanography, 2026, 45(2): 129-139.

Figures/Tables 9

Fig. 1

Fig. 2

Tab. 1

Fig. 3

Tab. 2

Main groups of macrobenthos in Halophila ovalis patches of the Zhulin sea area"

门类	科别	种类
环节动物门	沙蚕科	杜氏阔沙蚕Platynereis dumerilii
		红角沙蚕Simplisetia erythraeensis
		腺带刺沙蚕Neanthes glandicincta
		沙蚕亚科一种Nereidinae und.
		软疣沙蚕Tylonereis bogoyawlenskyi
		角沙蚕Ceratonereis mirabilis
	杂毛虫科	蛇杂毛虫Poecilochaetus serpens
	角吻沙蚕科	寡节甘吻沙蚕Glycinde bonhourei
	矶沙蚕科	岩虫Marphysa sanguinea
	索沙蚕科	克氏索沙蚕Lumbrineris crosslandi
	海稚虫科	冠奇异稚齿虫Paraprionospio cristata
		角腹钩虫Scolelepis angulata
		腺袋才女虫Polydora triglanda
		膜质伪才女虫Pseudopolydora kempi
		稚齿虫属一种Prionospio sp.
		微稚虫属一种Microspio sp.
		马丁海稚虫Spio martinensis
		海稚虫科一种1 Spionidae und.1
		太平洋稚齿虫Prionospio pacifica
	小头虫科	丝异须虫Heteromastus filiformis
	小头虫科	小头虫科一种Capitellidae und.
	海蛹科	中阿曼吉虫Armandia intermedia
	笔帽虫科	乳突笔帽虫Pectinaria papillosa
	蛰龙介科	琴蛰虫Lanice conchilega
	蛰龙介科	耳状琴蛰虫Lanice auricula
环节动物门	缨鳃虫科	鳍缨虫属一种Branchiomma sp.
	缨鳃虫科	拟缨鳃虫属一种Parasabella sp.
	海女虫科	锚颚海裂虫Syllidia anchoragnatha Sun et Yang, sp. nov.
	叶须虫科	围巧言虫Eumida sanguinea
软体动物门	长葡萄螺科	黄月华螺Haminoea flavescens
	牡蛎科	牡蛎科一种Ostreidae und.
	蛤蜊科	高蛤蜊Mactra alta
	满月蛤科	斯氏印澳蛤Indoaustriella scarlatoi
	满月蛤科	南海毛满月蛤Rugalucina vietnamica
	樱蛤科	拟箱美丽蛤Serratina capsoides
		红吉樱蛤Jitlada pumila
		仿樱蛤Tellinides timorensis
		幼形亮樱蛤Nitidotellina juvenilis
	竹蛏科	长竹蛏Solen strictus
		大竹蛏Solen grandis
		竹蛏属一种Solen sp.
	帘蛤科	突畸心蛤Cryptonema producta
		饼干镜蛤Dosinia biscocta
		裂纹格特蛤Marcia hiantina
		角镜属一种Dosinia sp.
		菲律宾蛤仔Ruditapes philippinarum
		青蛤Cyclina sinensis
	鸟蛤科	班氏脊鸟蛤Fragum scruposum
节肢动物门	藤壶科	网纹纹藤壶Amphibalanus reticulatus
	对虾科	对虾科一种Penaeidae und.
	对虾科	沙栖新对虾Metapenaeus moyebi
	鼓虾科	短脊鼓虾Alpheus brevicristatus
		叶齿鼓虾Alpheus lobidens
		角鼓虾属一种Athanas sp.
	活额寄居蟹科	长螯活额寄居蟹Diogenes avarus
	寄居蟹科	小形寄居蟹Pagurus minutus
	毛刺蟹科	真壮海神蟹Benthopanope eucratoides
	玉蟹科	隆线豆形拳蟹Pyrhila carinata
刺胞动物门	海葵科	海葵一种1 Actiniaria und.1
	海葵科	海葵一种2 Actiniaria und.2
	甲胄海葵科	甲胄海葵科一种Paranthus sociatus
纽形动物门	纽虫一种	纽虫一种Nemertea und.
星虫动物门	方格星虫科	裸体方格星虫Sipunculus nudus

Tab. 2

Fig. 4

Fig. 5

Fig. 6

Tab. 3

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季节	水质环境				沉积环境
季节	${\text{NO}}_{3}^{-}$/(μmol·L^-1)	${\text{NO}}_{2}^{-}$/(μmol·L^-1)	${\text{NO}}_{4}^{+}$/(μmol·L^-1)	${\text{PO}}_{4}^{3-}$/(μmol·L^-1)	硫化物/(mg·kg^-1)	有机碳/%
春	1.85±0.10	0.23±0.01	0.86±0.29^a	0.08±0.02	/	0.16±0.01
夏	21.25±1.18	2.06±0.03	1.89±0.04 ^b	0.06±0.01	5.3±3.2	2.97±1.19
秋	49.71±2.43	0.84±0.06	0.18±0.04^c	ND	12.1±7.6	3.14±0.41
冬	1.75±0.27	0.14±0.01	3.39±0.11^d	0.07±0.01	40.6±17.2	0.22±0.06

斑块类型	大型底栖生物位置	多样性指数(H′)	均匀度指数 (J)	丰富度指数(d)
雄株斑块	中心	2.12	0.86	3.18
雄株斑块	边缘	1.85	0.82	2.75
雌株斑块	中心	1.45	0.68	2.24
雌株斑块	边缘	1.41	0.75	2.08

Seasonal variations in growth and reproduction of Halophila ovalis, a dominant seagrass in Guangxi, and their center-edge effects within patches

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